File: dr494.c

package info (click to toggle)
swiftlang 6.1.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,604 kB
  • sloc: cpp: 9,901,740; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (30 lines) | stat: -rw-r--r-- 1,070 bytes parent folder | download | duplicates (15) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
 
/* RUN: %clang_cc1 -std=c89 %s -emit-llvm -o - | FileCheck %s
   RUN: %clang_cc1 -std=c99 %s -emit-llvm -o - | FileCheck %s
   RUN: %clang_cc1 -std=c11 %s -emit-llvm -o - | FileCheck %s
   RUN: %clang_cc1 -std=c17 %s -emit-llvm -o - | FileCheck %s
   RUN: %clang_cc1 -std=c2x %s -emit-llvm -o - | FileCheck %s
 */

/* WG14 DR494: yes
 * Part 1: Alignment specifier expression evaluation
 */
void dr494(void) {
  int i = 12;
  int j = _Alignof(int [++i]);
  int k = sizeof(int [++i]);
  /* Check that we store a straight value for i and j, but have to calculate a
   * value for storing into k. That's because sizeof() needs to execute code to
   * get the correct value from a VLA, but _Alignof is not allowed to execute
   * the VLA extent at runtime.
   */
/* CHECK: %[[I:.+]] = alloca i32
   CHECK: %[[J:.+]] = alloca i32
   CHECK: %[[K:.+]] = alloca i32
   CHECK: store i32 12, ptr %[[I]]
   CHECK: store i32 4, ptr %[[J]]
   CHECK: %[[ZERO:.+]] = load i32, ptr %[[I]]
   CHECK: %[[INC:.+]] = add nsw i32 %[[ZERO]], 1
   CHECK: store i32 %[[INC]], ptr %[[I]]
 */
}